Pros
- Very flexible, asynchronous work schedule.
- Reasonable pay, especially for the convenience.
- Can earn more with expertise.
Cons
- The work is unreliable with regular droughts (sometimes there's more than enough to work on, sometimes there's no work available).
- Highly unlikely to receive any performance feedback.
- You are not their employee, it is freelance work that qualifies (for me at least) as self-employment, so you have to plan ahead for taxes.